Official FlightLine RC 1600mm P-38 Lightning Thread

[Aros]

Okay something isn't right...I'm around 2.75" or 2.80" for CG. As it is right now, I need to add nose weight which I haven't heard anyone have to do, and I'm even using the exact batteries recommended for perfect CG. I can't shove the batteries any more forward or I can't get the hatch to close.

Paging Doctor Alpha... :)

[Grossman56]

[ATTACH=CONFIG]n35441[/ATTACH] Just 'cause I know you all will love it!

Grossman56

[TSHobbies]

not using the same lipos you are, but when I cycled the gear up...down the tail went. moved the batts all the way foward and still having to add 1.5 oz of lead to the nose..my lipos weight 12.7 oz each

[Grossman56]

I got the hang of it now. See I got a P38 too!!

Grossman56

[TSHobbies]

scratch my last..hatch wouldnt fit with the lipos all the way forward..so had to move them back and add a total of 3.5 oz to the nose.

[Aros]

I like it Gman!

TS...That's interesting...I wonder why we haven't heard anyone talk about needing to add weight to the nose?

[Aros]

Here's some pre-decal shots... :D

[TSHobbies]

I like it Gman!

TS...That's interesting...I wonder why we haven't heard anyone talk about needing to add weight to the nose?

other than the test planes that have been shown..havent heard anyone get theirs complete yet...

question about telemetry... never used it before, but just got an orange RX just for this plane w/tel ... when setting it up for the lipo monitor, its reading 0.0 volts..is it because of the control box? or because it has 2 lipos? or am I doing something wrong?

[TiredIronGRB]

Here's some pre-decal shots... :D

I really like the screen in the cowls.

[Lon]

other than the test planes that have been shown..havent heard anyone get theirs complete yet...

question about telemetry... never used it before, but just got an orange RX just for this plane w/tel ... when setting it up for the lipo monitor, its reading 0.0 volts..is it because of the control box? or because it has 2 lipos? or am I doing something wrong?

I have telemetry setup in a couple of my planes. But, I have Spektrum. With Spektrum you have the individual sensors that connect to the telemetry module. How is your Orange RX detecting/monitoring the battery? A sensor that connects to your telemetry module?

Also, what radio tx are you useing? I have the DX6.

[TSHobbies]

I have a DX9 and Im using this Rx..according to HK, it doesnt require additional modules.

https://www.hobbyking.com/hobbyking/store/__90622__OrangeRx_R720X_V2_7Ch_2_4GHz_DSM2_DSMX_Comp_Full_Range_Rx_w_Sat_Div_Ant_F_Safe_SB_AR_Warehouse_.html

[Aros]

I really like the screen in the cowls.

Thanks...Yours too. :)

[Lon]

I have a DX9 and Im using this Rx..according to HK, it doesnt require additional modules.
https://www.hobbyking.com/hobbyking/...arehouse_.html

Just guessing here...you have checked that the sensor for your voltage is properly plugged in? Also, i was reading there at HK, and it stated "integrated telemetry function can be disabled during binding." the receiver could be binded with the telemetry disabled, and that's why your not getting a reading?

[Aros]

Okay in order to get CG I have to add 8 ounces of nose weight. Yikes.

I would love to hear from Bajora and Alpha and anyone else who has already flown theirs. I would think they would have mentioned the need for nose weight. Interesting...

[PlaneCrazy]

Thanks...Yours too. :)

So Aros, is that fabric screen or metal screen?

[tdevince]

Aros,
I'm getting about the same data as you for CG. I need almost 6 oz of weight. I have 2 admiral 3000 Lipos as far forward as possible. Also, I have the Gear down for the balancing and need a bunch of lead in the nose to get close to the manual's 65mm.

Are you balancing with the gear down? I remember seeing that somewhere the balance is with gear down but can't find that detail in the manual. If I try with the gear up, I'll need more lead. I'm definitely not putting her in the air until I get this sorted. Something doesn't seem right because as you say Bajora and Alpha have been flying the heck out of theirs and I don't recall anybody talking about having CG issues.

[tdevince]

Aros,
What do you have for wheels? I replaced mine with 2.75" Dubro Mains and a 2.5" Dubro Nose gear, which are heavier than the stock wheels. I can't imagine it being that much of a difference, though. Also, are you balancing with the drop tanks on or off? I had them off for the balancing. It looks like their CG would be close to the plane CG so I can't imagine they are problem.

[tdevince]

Aros,
Just went back to the build video. There it states "65mm-75mm is the recommended balanced with the model upright and the landing gear down". Going closer to 75mm will definitely help, I'm going to recheck that value and see what I get.

Update: with the model upright and gear down I get 72mm for the CG. Adding the drop tanks changes to 74mm. So I'm at the aft portion of the recommended range without adding any nose weight.

[jagdpanther9]

hi guys,my model is bone stock no mods yet other than a little paint here and there. mine made c/g on my c/g machine right side up no drop tanks @ 70 mm with gear down and 66-67 mm with the gear up. i am using the admiral 3000 35c batteries here is the battery location. the vid here said to balance 65-75 mm with the gear down. i most likely wont fly mine with drop tanks. adding the rest of my decals and should maiden sunday if i can sneak away from Easter. =D

[ruffneckx1]

To the guy's thinking of adding invasion strips here's a little info. I've found that the paint on the booms stand up to masking.
On mine at least the wings don't take to masking very well. Paint lifts off the surface rather easily. Be especially careful when removing tape. At least that has been my experience so far.

Also.....question regarding the c/g. The c/g on models with retracts is usually set with gear up. Can anyone explain why the switch ?
Woody